Many of your business expenses fall into clear-cut categories for tax deduction purposes. But a bunch of them aren’t so clear. Business Opportunities Weblog invited a guest to identify and explain the “9 hardest to classify business deductions”. Even if you’ve already filed your 2008 return, click on the link and read the post in full, because it will help you with your bookkeeping for 2009 and forward. I learned a lot.